Conrad III. (d.1152)

Conrad III., founder of the Hohenstaufen dynasty; elected Emperor of
Germany in 1138; had Henry the Proud, as head of the German Guelfs, for
rival; crushed him at Weinsberg; joined Louis VII. of France on a third
crusade, and returning, overthrew the Guelfs again, leaving Barbarossa as
his heir; (d.1152).